SLS Officially Slipping to Late 2021, At Best

Eric Berger over at Ars Technica with his typical great insight from interesting sources:

According to a NASA source familiar with this assessment, the agency found that under current plans, including a โ€œgreen runโ€ test firing of the core stage at Stennis Space Center in 2020, the Artemis-1 mission would not be ready for launch until at least โ€œlate 2021.โ€ Moreover, NASA was likely to need more money—above the more than $2 billion it already receives annually for SLS development—to realistically make a late 2021 launch date.